Crittenton pleaded guilty Monday afternoon to possession of an unregistered firearm. Prosecutors are expected to drop a second misdemeanor charge of attempted carrying a pistol without a license.Prosecutors say they won’t oppose a sentence of probation.Crittenton’s lawyer, Peter H. White, says Crittenton brought a legally owned, unloaded handgun to Washington “only because he legitimately feared for his life.” He says the player accepts responsibility for his conduct.Arenas pleaded guilty on Jan. 15 to a felony gun charge connected to a locker-room argument that is believed to have involved Crittenton.